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Basic citation
Content title (link to original work) by author, licensed by The Pennsylvania State University (https://roam.libraries.psu.edu), Creative Commons license (CC BY-NC-SA 4.0), https://creativecommons.org/licenses/by-nc-sa/4.0/, accessed (date)
Citation for modified content
Content title (link to original work) by author, licensed by The Pennsylvania State University (https://roam.libraries.psu.edu), Creative Commons license (CC BY-NC-SA 4.0), https://creativecommons.org/licenses/by-nc-sa/4.0/, accessed (date) / simple explanation of modification
Citation if you make a derivative work
This work, “name of your derivative work,” is a derivative of “Content title” (link to original work) by author, licensed by The Pennsylvania State University (https://roam.libraries.psu.edu), Creative Commons license (CC BY-NC-SA 4.0), https://creativecommons.org/licenses/by-nc-sa/4.0/. “Name of your work” is licensed under Creative Commons (CC BY-NC-SA 4.0), https://creativecommons.org/licenses/by-nc-sa/4.0/ by [your name here].
See the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License (CC BY-NC-SA 4.0) for details. You may also refer to Penn State's policy on courseware and courseware modules - Policy IP03: Courseware.